a response team on site, attempting to locally personnel later, a known terror group was said to be linked. nbc tripoli reports the group claimed responsibility on facebook and twitter and has called for an attack on nbc tripoli. the next day the same terror group denied they were involved, causing more confusion. >> you know, posting something on facebook is not in and of itself evidence, and i think it just underscores how fluid the reporting was at the time and continues for sometime to be. >> reporter: shortly before midnight on 911, another e-mail reported that the assault on benghazi had escalated. the current shelter is under attack by mortar fire, today, reports of injuries the white house and state department says there were hundreds and even thousands of reports that night, and in the following days. all had to be analyzed. today, secretary clinton appealed for patience on benghazi, while a review board investigates what went on benghazi, but the white house knows that any detail can become a new source of criticism. andrea mitchell, nbc news, washington. >>> still ahead as nbc n